Automatic train-stop for railways.



E s. LOVETT & s. T. ALDRICH. v AUTOMATIC TRAIN. STOP F0 RHRAILWAYYS,

APPL ICATION FILED JUNE 4, 1914..

Patented Oct. 17, 1916.

3 SHEETS+SHEET IL v AUTOMATIC TRAIN STOP FOR R -AILWAYS.

APPLICATION FILED JUNE 4. 1914.

Patnted 0 111-1916.

3SHEETS-SHEET'2 E. s. 'LOVETT & s. T ALDRICH.

AUTOMATIC TRAIN STOP FOR RAILWAYS.

APPLICATION FILED JUNE 4. 1914.-

3 SHEETS-SHEET}.

W/rA/595E5- wax mm 27 I 74/. [m g I V I I Pafpentd Oct. 17,1916.

UNITED STATES PATENT OFFICE.

EUGENE S. LOVETT AND SIDNEY '1. ALDRICH, OF LOWELL, MASSACHUSETTS.

AUTOMATIC TRAIN-STOP FOR RAILWAYS.

Specification of Letters Patent. P tented O t. 17, 1916.

Application filed June 4, 1914. Serial No. 843,079.

To all whom it may concern:

Be it known that we, EUGENE S. Lovnrr and SIDNEY T. ALnRIcI-I, both citizens of the United States, residing at Lowell, in the county of Middlesex and Commonwealth of Massachusetts, have invented jointly a certain new and useful Improvement in Automatic Train-Stops for Railways, of which thefollowing is a specification.

This invention relates to automatic train stops for railways where the train is' provided with air-brakes, and has for its principal objects: Means for operating the valve of the supplementary reservoir to release the air from said reservoir to the atmosphere; means comprising a supplementary airchamber, or reservoir, for collecting and removingcondensed moisture from the compressed air thereby preventing the brake from being rendered inoperative by freezing; improved means for raising the triprod out of operative position from the cab of the engine; and convenient means for re turning trip-rod to operative position.

This train-stop may be operated by any movable piece, as the draw of a draw-bridge, a switch or a semaphore, which is in a position to make the passing of a train dangerous or impossible and which is suitably con-. nected to-an actuating trip.

In the accompanying drawing Figure 1 is a right side elevation of so much of a-locomotive engine provided with our improvement as is necessary to the understanding of the same; Fig. 2, a right side elevation of the train-stop with the trip and track rails, the parts being about to be operated; Fig.

3, a right side elevation of the train stop being operated; Fig. 4, a plan of apart of the bent lever, connecting rod and valveoperating or trip-lever; Fig. 5, a horizontal section of the valve slide, supplementary reservoir and hanger, on the line 5 5 in Fig. v

2, the valve being closed; Fig. (5, a vertical sectiol of the same on the line 6 (i in Fig. 3, the valve being open; Figs. 7 and 8, respectively, a side elevation and a front elevation of the trip-box and trip in operative position; Fig. 9, an isometric view of the trip located between the rails, of a railway track, a semaphore in indicating position and the connecting means between the semaphor'. and the trip.

In Fig. 1, A denotes the boiler; a. a the driving wheels, a a the truck wheels; a

the' breast-beam; ax, the pilot,.B, the back i the track.

of the cabs?) the floor ofthe same; 'these parts of a locomotive engine being of any usual construction. C C arethe rails-of The usual main reservoir auxiliary airchambers or reservoirs and. train-pipe are sented as supported by an angle-iron or.

bracket d (Figs. 1 and 5) boltedto the breast-beam a. The valve-case E is represented as an externally-threaded hollow cylinder which is screwed into an internally threadedhole in the hanger D. The valve e isrepresentedas a frustum of a cone and has a stem e which runs in guides e e", secured to the front and back of the case E. A spring, represented as a spiral spring e, surrounding the valve stem e and compressed between the valve 6 and the guide e, tends to push said valve from its seat. A slide F is movable horizontally in ways f f, integral withor secured to the outer or front face d of. the hanger D and is provided with a stud f which projects from said outer face and with a double incline f,

the middle portion of which normally bears l upon the outer end of the valve stem e jand holds said valve to its seat, the .valve being opened by thespring e when said incline is moved horizontally in either direction off from said stem. The incline. f has a groove f which is square in cross-section, to receive theflend e of the valve-stem e,

of the hanger l) and surrounds in an airtight manner ther'ear end of the valve-case and is provided with a coupling nipple g i to which the train-pipe is connected in practice. I

The trip-lever H is provided with a longitudinal slot h which allows said lever to ,limiting the downward movementof said lever. 'When said trip-rod or lever H is turned onthe fulcrum 72, in either direction far enough, it moves the slide F and causes the incline f to slide oil from the valvestem, allowing thevalve to be opened by the spring a or by the pressure of the air in 'the supplementary reservoir G, and the air cab and is jointed to a lever J which being drawn backwardwill raise the link i and trip-lever into a vertical position in such a manner as to force the slide F to its normal position and close the valve. By means of the lever J the engineer can. raise the triplever high enough to clear the trip K, here-- inafter described.

The upper end of the link 71 is very loosely connected to the arm 2', to allow the upper end of the trip-lever H to move with great freedom, by means of apin which passes through the forked front end of said arm i and through a'large triangular hole 6 in the upper end of said link, which hole permits sufficient movement of said trip-lever without any movement of the arm '5 but when said arm 2 is raised the rod will let go after being drawn as above described, will be'returned to normal position by a spring, represented as a spiral spring j surrounding said rod j and compressed between collar j fast on said rod, and the back of the cab. i

A trip K (Figs. 8 and 9) is pivoted at 70 to move in a plane at right angles to the track-rails O C and is represented as arranged within a box 10 secured to a base plate k on the cross ties L L and provided with a hinged cover it which is struck and raised by swinging said trip from its horizontal inoperative position to a vertical po-' sition when said trip projects above the top of the box and above the cover. When the trip is'being restored to inoperative position, it strikes a hook Ila jointed to the underside of the cover and draws the cover down, closing the box and excluding rain, snow and dirt.

The trip K is represented as connected be low its pivot is by link if and rod 70 to a le 'ver 70 which is connected by rods c 7:: to

another lever 72, the last named lever is? be ing connected by a rod to one arm of a bulb crank lever 70 the other arm of which is connected by the rod LM to the blade a of a semaphore N, so that raising said blade raises the trip into operative position and lowering said blade returhs said trip to inoperative position. Obviously, the lever Z5 might turn upon a vertical as well as upon a horizontal pivot and rod M might connect said lever to any movable part used in or about a railway to raise the trip by moving said part to a certain position.

One of the rods 70 and the arms of the levers 7.1 is connected by said rod may be dispensed with.

The most convenient position for the triplever andtrip will be midway between the;

rails of the trackv to accommodate trains passing in either direction.

We claim as our invention 1. The combination of a valve, automatic means for opening said valve, a slide'having an incline normally to close said valve, a normally vertical trip-lever to operate said slide to release said valve, a rod arranged to slide longitudinally and to be operated from the cab of an engine, a rock-shaft having an arm jointed to said rod and having another arm provided with a. pin and a link, one end or" which is pivoted to the upper end of said trip-lever and the other end of which is provided with a triangular slot loosely to receive said pin, to enable said trip-lever to be restored said rod.

The combination. of a valve, automatic means for opening said valve, a slide having an incline normally to operate said slide, to release said valve, a rod to close said valve, a normally vertical trip lever arranged to slide longitudinally and to be operated from to normal position by drawing the cab of an engine, a rock-shaft having an EUGENE S. LUVET'l. StDNEY l. ALDRHl/l'l.

VltllQSSGS! v I Annular M. lvloonn, Janna ll. CARMICHAEL. 

